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#include "mackie_jog_wheel.h"
#include "mackie_control_protocol.h"
#include "surface_port.h"
#include "controls.h"
#include <algorithm>
using namespace Mackie;
JogWheel::JogWheel( MackieControlProtocol & mcp )
: _mcp( mcp )
, _transport_speed( 4.0 )
, _transport_direction( 0 )
, _shuttle_speed( 0.0 )
{
}
JogWheel::State JogWheel::jog_wheel_state() const
{
if ( !_jog_wheel_states.empty() )
return _jog_wheel_states.top();
else
return scroll;
}
void JogWheel::zoom_event( SurfacePort & port, Control & control, const ControlState & state )
{
}
void JogWheel::scrub_event( SurfacePort & port, Control & control, const ControlState & state )
{
}
void JogWheel::speed_event( SurfacePort & port, Control & control, const ControlState & state )
{
}
void JogWheel::scroll_event( SurfacePort & port, Control & control, const ControlState & state )
{
}
float scaled_delta( const ControlState & state, float current_speed )
{
return state.sign * ( pow( state.ticks + 1, 2 ) + current_speed ) / 100.0;
}
void JogWheel::jog_event( SurfacePort & port, Control & control, const ControlState & state )
{
// TODO use current snap-to setting?
#if 0
long delta = state.ticks * sign * 1000;
nframes_t next = session->transport_frame() + delta;
if ( delta < 0 && session->transport_frame() < (nframes_t) abs( delta ) )
{
next = session->current_start_frame();
}
else if ( next > session->current_end_frame() )
{
next = session->current_end_frame();
}
// doesn't work very well
session->request_locate( next, session->transport_rolling() );
#endif
switch ( jog_wheel_state() )
{
case scroll:
//ScrollTimeline causes crashes
if ( _mcp.mcu_port().emulation() == MackiePort::bcf2000 )
_mcp.ScrollTimeline( state.ticks * state.sign / 100.0 );
else
_mcp.ScrollTimeline( state.ticks * state.sign / 100.0 );
break;
case zoom:
// TODO do a for loop for each, to number of ticks
if ( state.sign > 0 )
for ( unsigned int i = 0; i < state.ticks; ++i ) _mcp.ZoomIn();
else
for ( unsigned int i = 0; i < state.ticks; ++i ) _mcp.ZoomOut();
break;
case speed:
{
// block because we initialize a variable
// locally, _transport_speed is an absolute value...
// fairly arbitrary scaling function
_transport_speed += scaled_delta( state, _mcp.get_session().transport_speed() );
// make sure not weirdness get so the session
if ( _transport_speed < 0 || isnan( _transport_speed ) )
{
_transport_speed = 0.0;
}
// translated current speed to a signed transport velocity
_mcp.get_session().request_transport_speed( transport_speed() * transport_direction() );
break;
}
case scrub:
{
add_scrub_interval( _scrub_timer.restart() );
// copied from tranzport driver
float speed = 0.0;
// This should really be part of the surface object
if ( _mcp.mcu_port().emulation() == MackiePort::bcf2000 )
// 5 clicks per second => speed == 1.0
speed = 50.0 / average_scrub_interval() * state.ticks;
else
// 10 clicks per second => speed == 1.0
speed = 100.0 / average_scrub_interval() * state.ticks;
_mcp.get_session().request_transport_speed( speed * state.sign );
break;
}
case shuttle:
_shuttle_speed = _mcp.get_session().transport_speed();
_shuttle_speed += scaled_delta( state, _mcp.get_session().transport_speed() );
_mcp.get_session().request_transport_speed( _shuttle_speed );
break;
case select:
cout << "JogWheel select not implemented" << endl;
break;
}
}
void JogWheel::check_scrubbing()
{
// if the last elapsed is greater than the average + std deviation, then stop
if ( !_scrub_intervals.empty() && _scrub_timer.elapsed() > average_scrub_interval() + std_dev_scrub_interval() )
{
_mcp.get_session().request_transport_speed( 0.0 );
_scrub_intervals.clear();
}
}
void JogWheel::push( State state )
{
_jog_wheel_states.push( state );
}
void JogWheel::pop()
{
if ( _jog_wheel_states.size() > 0 )
{
_jog_wheel_states.pop();
}
}
void JogWheel::zoom_state_toggle()
{
if ( jog_wheel_state() == zoom )
pop();
else
push( zoom );
}
JogWheel::State JogWheel::scrub_state_cycle()
{
State top = jog_wheel_state();
if ( top == scrub )
{
// stop scrubbing and go to shuttle
pop();
push( shuttle );
_shuttle_speed = 0.0;
}
else if ( top == shuttle )
{
// default to scroll, or the last selected
pop();
}
else
{
// start with scrub
push( scrub );
}
return jog_wheel_state();
}
void JogWheel::add_scrub_interval( unsigned long elapsed )
{
if ( _scrub_intervals.size() > 5 )
{
_scrub_intervals.pop_front();
}
_scrub_intervals.push_back( elapsed );
}
float JogWheel::average_scrub_interval()
{
float sum = 0.0;
for ( std::deque<unsigned long>::iterator it = _scrub_intervals.begin(); it != _scrub_intervals.end(); ++it )
{
sum += *it;
}
return sum / _scrub_intervals.size();
}
float JogWheel::std_dev_scrub_interval()
{
float average = average_scrub_interval();
// calculate standard deviation
float sum = 0.0;
for ( std::deque<unsigned long>::iterator it = _scrub_intervals.begin(); it != _scrub_intervals.end(); ++it )
{
sum += pow( *it - average, 2 );
}
return sqrt( sum / _scrub_intervals.size() -1 );
}
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